1.Office software and System daily maintenance and management (IP-Phone System/OA System/Microsoft 365/Monitoring/Door access system); 2.Office Network and Test Network environment (Cable/wireless) daily maintenance and trouble shooting; 3.Office Hardware daily maintenance and trouble shooting (Desktop/laptop/Testcell computer/display/projectors/IP-Phone/network printer, etc.); 4.Network Hardware daily maintenance and trouble shooting (Switch/Router/Server, etc.); 5.Server/Office/Test Data Backup and Restore; 6.The IT knowledge base document Write and maintain & IT assets management.